From fca84900bf3f1269b6669e7f3dc99810e65d75c8 Mon Sep 17 00:00:00 2001
From: Leo Yan <leo.yan@linaro.org>
Date: Fri, 31 Dec 2021 13:32:14 +0800
Subject: [PATCH 17/21] perf arm-spe: Refactor operation packet handling

mainline inclusion
from mainline-v5.11-rc1
commit e771218f32f97c0940ae46c23e20d27f3d4c05e3
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4NGPV
CVE: NA

-------------------------------------------------

Defines macros for operation packet header and formats (support sub
classes for 'other', 'branch', 'load and store', etc).  Uses these
macros for operation packet decoding and dumping.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Al Grant <Al.Grant@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wei Li <liwei391@huawei.com>
Link: https://lore.kernel.org/r/20201119152441.6972-14-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: hongrongxuan <hongrongxuan@huawei.com>
---
 .../arm-spe-decoder/arm-spe-pkt-decoder.c     | 26 ++++++++++---------
 .../arm-spe-decoder/arm-spe-pkt-decoder.h     | 23 ++++++++++++++++
 2 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
index d6c060f119b4..1d1354a0eef4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -144,7 +144,7 @@ static int arm_spe_get_op_type(const unsigned char *buf, size_t len,
 			       struct arm_spe_pkt *packet)
 {
 	packet->type = ARM_SPE_OP_TYPE;
-	packet->index = buf[0] & 0x3;
+	packet->index = SPE_OP_PKT_HDR_CLASS(buf[0]);
 	return arm_spe_get_payload(buf, len, 0, packet);
 }
 
@@ -328,31 +328,33 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
 	int err = 0;
 
 	switch (packet->index) {
-	case 0:
+	case SPE_OP_PKT_HDR_CLASS_OTHER:
 		arm_spe_pkt_out_string(&err, &buf, &buf_len,
-				payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+			payload & SPE_OP_PKT_COND ? "COND-SELECT" : "INSN-OTHER");
 		break;
-	case 1:
+	case SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC:
 		arm_spe_pkt_out_string(&err, &buf, &buf_len,
 				       payload & 0x1 ? "ST" : "LD");
 
-		if (payload & 0x2) {
-			if (payload & 0x4)
+		if (SPE_OP_PKT_IS_LDST_ATOMIC(payload)) {
+			if (payload & SPE_OP_PKT_AT)
 				arm_spe_pkt_out_string(&err, &buf, &buf_len, " AT");
-			if (payload & 0x8)
+			if (payload & SPE_OP_PKT_EXCL)
 				arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCL");
-			if (payload & 0x10)
+			if (payload & SPE_OP_PKT_AR)
 				arm_spe_pkt_out_string(&err, &buf, &buf_len, " AR");
-		} else if (payload & 0x4) {
+		} else if (SPE_OP_PKT_LDST_SUBCLASS_GET(payload) ==
+					SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP) {
 			arm_spe_pkt_out_string(&err, &buf, &buf_len, " SIMD-FP");
 		}
 		break;
-	case 2:
+	case SPE_OP_PKT_HDR_CLASS_BR_ERET:
 		arm_spe_pkt_out_string(&err, &buf, &buf_len, "B");
 
-		if (payload & 0x1)
+		if (payload & SPE_OP_PKT_COND)
 			arm_spe_pkt_out_string(&err, &buf, &buf_len, " COND");
-		if (payload & 0x2)
+
+		if (SPE_OP_PKT_IS_INDIRECT_BRANCH(payload))
 			arm_spe_pkt_out_string(&err, &buf, &buf_len, " IND");
 
 		break;
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 42ed4e61ede2..7032fc141ad4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -105,6 +105,29 @@ enum arm_spe_events {
 	EV_EMPTY_PREDICATE	= 18,
 };
 
+/* Operation packet header */
+#define SPE_OP_PKT_HDR_CLASS(h)			((h) & GENMASK_ULL(1, 0))
+#define SPE_OP_PKT_HDR_CLASS_OTHER		0x0
+#define SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC	0x1
+#define SPE_OP_PKT_HDR_CLASS_BR_ERET		0x2
+
+#define SPE_OP_PKT_COND				BIT(0)
+
+#define SPE_OP_PKT_LDST_SUBCLASS_GET(v)		((v) & GENMASK_ULL(7, 1))
+#define SPE_OP_PKT_LDST_SUBCLASS_GP_REG		0x0
+#define SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP	0x4
+#define SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG	0x10
+#define SPE_OP_PKT_LDST_SUBCLASS_NV_SYSREG	0x30
+
+#define SPE_OP_PKT_IS_LDST_ATOMIC(v)		(((v) & (GENMASK_ULL(7, 5) | BIT(1))) == 0x2)
+
+#define SPE_OP_PKT_AR				BIT(4)
+#define SPE_OP_PKT_EXCL				BIT(3)
+#define SPE_OP_PKT_AT				BIT(2)
+#define SPE_OP_PKT_ST				BIT(0)
+
+#define SPE_OP_PKT_IS_INDIRECT_BRANCH(v)	(((v) & GENMASK_ULL(7, 1)) == 0x2)
+
 const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
 
 int arm_spe_get_packet(const unsigned char *buf, size_t len,
-- 
2.27.0

